In yesterday's NY Post, film critic Kyle Smith sent a public missive to Atonement actress Keira Knightley, chastising her for getting "too thin". My first reaction was one of curiosity: An open letter to a Hollywood actress in the Post's Op-Ed section? Really? My second reaction was one of appreciation: Kudos to Smith for arguing against the idea that men only want "bag of rakes"! But then, I wondered: Is there anything so wrong with some men preferring skinny women?

It all comes down to a concept called PSFM — Perfect Size For Me. I can't take credit for it — I heard about it from a friend — but Perfect Size For Me is the idea that everyone has a "size". It's not always the ideal frame, either. Some people love huge booties. Others go gaga over small breasts. Some folks are into some chunk, and yet others like a butt rug. People finding lots of different things attractive is what makes the world go 'round.

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On the other hand, lots of men just want a skinny girlfriend as a trophy because society deems female thinness aspirational. I know there are legions of men (and women!) who criticize their partners' weight and that's never okay. Do you think men who want only thin women are misogynistic pricks, or are they just practicing PSFM?